Combined steam generator and feed water preheater and purifier



P 1932- v o. H. HARTMANN ET AL 1,878,514

COMBINED STEAM GENERATOR AND FEED WATER PREHEATER AND PURIFIER Filed Feb. 1'7, 195]. 2 Sheets-Sheet 1 Inventor; OTTO H. HAQTMANN and HANS TFZEDE.

5: Their Aw p 1932- o. H. HARTMANN ET AL 1,373,514

COMBINED STEAM GENERATOR AND FEED WATER PREHEATER AND PURIFIER Filed Feb. 17, 19:51 2 Sheets-Sheet 2 lnven t 0 r5 OTT ,.HAI2TMANN and N5 T125105 5: Their A'tw Patented Sept. 20, 1932 m Barnum mm OTTO n." nnnrmnnn, on KAssnnwrLnnLMsnon-E; AND HANS manna; ornnssnn GERMANY; ASSIGNORST T0 SCHMIDT SGHE HEISSDAMPF GESEIJL SICHRANKTER EBFTUNG, OF"K:ASSEIFWILHEL IMSHOHE, GERMANY,

or GERMANY.

= comnlnnn STEAM-1 ennnnn ron ann rnn A'pp1icationnfiled February: 17;'..1931;,.Ser.ia1 no.

, This invention relates,to-van apparatus ,for preheating; and purifying boiler feed ,water:

and \concernslitself: particularly i with one which the incomingfeed.Wateris caused tOa' 5 flow-anddrip over. a suitable fiowsurfaceor surfaces arranged in the steam space of the boileri drum. Inorder to, obtain, the desireddegree of purification and. preheating in ,a.

device of this type, the flow surfaces which are laved by; the-incoming water are necessarily,

' of considerable area'so thatgreattdifiiculties have been; experienced inyeifecting, their insertion; and removal from the boiler. drum; t

A general object of the; present invention. isthe provision. ofia purifier and .preheater. of this type which: is: 'so constructed; that; it. is cap able of beingehandledi Withease and .dis- I patch so that its insertion and removalifrom: the (infill- Will be.-. greatly facilitated;

In the. case of "steamlboilers Whose drums, have interiorr structures.- built, therein: the. problem 1 of handling wfiQW and drip members within the drum becomes-the more acute in+ as-muclr as the interior structures restrict their movement. The drums, of, boilers in:

which steam is generated indirectly, for, ex?- ample, contain heating elements through, which a heating medium circulates and which? restrict the unobstructed space in the drum within which the flow surfaces oftheipurifier; can be manipulated Purifiers-and.prehe'ate ers constructed in-.- accordance"v with; this; in-

' vention therefore find p articularly," favor-able, application in. boiler: drums having interior structures 'andwan object ofthe invention; is: the provision of 1 a construction enabling the? insertion andremoval' Of'ithQflOW member or: members of tho preheater and purifier from; the drum withoutdisturbingythe; interior, structural elements. p V V ltis not desirable to direct the incoming; feedwater directly over or upontheheab ing elements or similar interior structures within the drum and the-invention therefore, further contemplates an arrangement in which the water fro1n'thepurifier and. prev heater is led-.to the-water space-at points: 1'8? I V tagein that theentire heating tacted by the water even when the drum 7 either longitudinally." or 100 moved from the r main body} of the; interior structures. v 59 Anadditlonal advantage contemplated is cmetalpla-t es mounted on a p ng relatlon at progressively increasing'elee a scnnrr MIT nn-q,

n'wnrnn rnnnnn'rnn nnnarunrrlnn: I 516,522,; and-tin GermanyyfEebruary 528; 1930.

that of obtainingthe desirable degreeof-pre-r heating, This. is provided for by substan-- tially freely exposing the undersideofj'the elements presentingthe flow surfaedtolthew steam generatedfromthe Water in th'ewater space. v i v In a. carrying out the invention, flow andidripimembers are arrangedlongitudinally, of the drum% an blie's of, independent units, to be removed orfinserted. separately and con: venientlyg Inone embodimentaof the inven T tion the a independent, unit: constitutes Slifitj frame'inoverlap vations, there being, a collection gutter. with outlet openings attire-lowest. plate. These individualjunits arearrangedand supported endtoend longitudinally o'f the drum land in oblique positioniso that they, assembledxinto position: to formfthe flow" member, a composite terraced flowsurface-v descending from the topof the drumjat the center,,l downwardly towards a. side, and,

which. extendslsubst antially continuously in 1 longitudinal, direction; The flow member. may abe arranged oneither side of the drum," or- :if. desired, ,provisionimay; be made for. assembling, the units interchangeably on, either; side; A flow member may further, be arranged on bothlnsides-if necessary. 7 Thecol-,; lent-ion; gutters are adjacent the sidewalls v Offtlle drum so that'the-water, fromthe'terf raced, flow-surface will be discharged at the side Wallsfthrough the outlet openings in the 3 gutterswwhereby thepouringrof the water over the-heating structuresis avoided The feed-Water is de liveredito' the; individual units at their upper;

. most portions byr means i of V a conduit having outletopen-ings facing, the flow surfaceiand. steam is taken from the drum by: means of a conduit at theupper part of thest'eamv space at the side of the flow surface. The flow plates are preferably made, of easily rusting 955 metal. r i

The arrangement has thefurther" advansurface is COI1 changes itsposition,

A oonrenn'rrom the.

d, comprise assemg I ach of which can 66% present, when], 7;;

elements or'otherfinterior 7 transversely, as would occur for instance in a marine installation due to the rocking of theship- I In the drawings, which are illustrative of the invention, Fig. 1 shows'a vertical longi tudinal section through the upper drum of a steam-boiler having therein a purifier and preheaterconstructed in accordance with y en on; 1 Fig. 2 is a cross section, along line 2 2 of Figzlbut to a greater scale;

Fig. 8 is a cross section along the line in Figs. 1 to 4 is made up of a plurality of 7 individual units whichare arranged longi- V tudinally of the drum. Each of the units comprises a plurality of jsheet metal flow plates 2 arranged in overlapping relation and secured to a frame 3 to forin aterraced' surface. Below the lowest plate '2 there is a collection gutter 4 provided with outlet openings 5 and positioned to catch the waterflowing overtheplates of the unit. The: lower portion of the frame 3 is provided with arms 14, slottedat their ends as shown in (leitail in Fig. 4, and the upperportion of the frame is provided with'hooks 7 as also shown in 'Fig. 4.

convenient manner are a lower supporting rod 6 and an upper supporting rod 7. These rods 6 and 7 run longitudinally of the drum and are parallel. the drum theindividual units comprising the flow member are moun'tedon the rods'6 and 7 adjacent one another so that'the plates 2 ofiadjacent units are positioned end to end andfpresent a longitudinally continuous stepped fiow surface. l/Vhen a unit is to be attached to the supporting rods the slotted ends of the lowerarms 14;:ireplaced in en' gage nent with the lower' supporting rod 6 and the unit is then pivoted upwardly and raised slightly until the hooks 7 are brought over the supporting rod 8. The'un'it is then droppedto bring hooks 17- into engagement with rod 8. Ifitis de'sired to fix the unit b more securelyto the supporting rods a bolt 13 maybe used to prevent unintentional-dis V placement from rod 8; The feed water is led to theflow'surface through a conduit?) provided with slotted discharge openings 10 facing the upper-portion of the flow surface. In'consequeneethe feed'i water is continuously; and uniformly di- 5 rectedagainst the upper plates of the flow Secured to the wallsof the 'druin'in any Whenassembled within rl2 throughwhich the heat carrier gives ofl' itslieat to the water 'whichis to be con-' member and then drips down over the plates 2 into the collecting gutters 4, finally passing through the discharge openings 5 into the waterspace ofthe drum. If desired, discharge conduits leading to the bottom of the water s charge openings'5- Due to the flowing and 'dripping'of the water over theplatesfl it is highly preheated to temperatures dependent upon the dimensions of the contactsurfaces. oreover, such gasesv as the carbonic acid gases and oxygen are removed and carried with the steam to the point of usethrough the outlet conduit 11 arranged at -the side of the purifier.

' In the" modification described above thereis a flow member on only one side of the drum,

but in the modification disclosed inF-ig. 5 there are flow members on bothsides. l/Vlietheror not ibis desirable to assemble a flow member on only one sideor on both sides depends in general upon the size of the drunn that isupon the ainountof available space. There the drumis of relativelygreat length as compared to its diameten'a flow member arranged on asingle side or a single flowmember which is adapted to be shifted from right to leftyand vice versa is generally sufficient. here the length is relatively small, however, it is advantageous to arrange a flow member on bothsides of the drum. The structural details of the arrangement shown in Fig. 5 are the same asthose shown in Figs. 1 to 4. Each liow membericonstitutes an: assembly of units similar to that disclosed in Figs. 1 to 4. 'The steam is taken of? by means of a conduit 11 arranged in the upperportion of the drum 1 between the two flow members. Each of the flow members is provided with a feed water conduit 9 having side openings for'delivering the water to the plates constituting theflow sur-- faces.

i the examples shown'in the drawings,

the drum disclosed is-one adapted for indirect steam generation by means ofa heat carrier although the inventionis not necessarilylimited todrumsof this type. j Its principles can also be used advantageously n drums wherein steam is generated directhe drum-1 contains heat ng elements verted into steam and the flow members are so arranged that their individual units may inserted and removed over and above the pace may be connected to the .dis-

heating elements 12.] lnn asseinbling a fiow member it is only necessary to insert the in dividual units through the inanhole of the drum and move them'over'the heating elements 12 te'the. positions at which they are to be mountedupon the supporting rods. When opposite the point at which any particular unitis to be mounted, it is moved towards the side of the drum so that the slots new, s14

in its lower arms 14 will engage the lower rod 6. The-element is then tilted moval of the unit is of course accomplished in reverse order. After the bolt18 has been removed and the unit is lifted suliicientlyto enable the ends of the lower'rod 6 until it again rests on the upper side of the heating elements 12. The size of the individual units is amatten of selection but in general it hasbeen found convenient to malre them so small that they can easily be handled by two men. 1 i

Theunits are preferably constructed of material which rusts readily so that the 'oXygen present will combine with this material and not with the material of the remainder of the drum structure, for instance, the, material of the heatingelements 12 which might be harmedby corrosion. I i

As clearly shown in thedrawings the discharge ofthe preheated and purifier water takes place at the sides adjacent the drum wall sov that the water will-,notbe'poured over the heating element12.

Having now described our invention, what we now claim as new anddesire to secure by Letters Patent of the United States is as,

follows: i

1. A feed water preheating and'purifying apparatus disposed within thesteam space of a drum in which steam is generated,-c0m

prising a flow member presenting a composite downwardly inclined flow surface and being constituted of a plurality of individual units each supported to present: aportion of said" composite flow. surface, and means for directing feed. water substantially uniformly against the upper portion of said composite flow surface, each of said individual units constituting a frame carrying metallic plates and detachably secured to the drum walls with its upper end near the top of the drum adjacent the median plane of the water body and with its lower end adjacent the water surface at the side of the drum, the uppersur V faces of the metallic plates comprising portions of the composite flowsurface and the lower surfaces of said. plates being freely exposed to the steam generated fromthe water in thewater space. f I 2. A feed water preheating and purifying apparatusdisposed within the steam space ofa drum in which steam is generated, comprising a flow member extending longitudi'- nally of the drum and presenting acomposite flow surface terraced in cross-section and inclining transversely of the drum froma longitudinal line of highest elevation near the top of the drum and adjacent the median plane of the water body to a longitudinal line'of lowest elevation adjacent the water-surface spending plates of hooks 7 to clear the v "substantially common planes top. of the rod 8, it isthen pivoted aboutthe prising a p v nally-of the drum and presenting a composite 1;

- wardlyv over stepped relation, said units being independh and removably secured side by side lon- "i entlygitudlinally'of. the drum so that the correadjacent. unit s lie in to form the composite terrace surfaces running longitu-g dinally of tlie'drum, and means for directing feed water substantially uniformly against the upper plates of said units, whereby said water is preheatedvand-purified by flowing downwardly over'fthe sheet metal. plates; 7

3'. Asfeed water preheating and purifying apparatus disposed within the steam space of a drum inwhich steam (is. generated, com

flow member extending longitudifiow surface terraced in cross sectiona'nd inclin-ing transversely ofthe drum from a'-longitudinal l ne of highest elevation nearthe top of the drum andjadjacent themedian plane of the water body to a longitudinal line:of-

lowest elevation adjacent the water surface 5 atthe side of the drum, said flow member be.-

' ingconstituted of a plurality of individual units each comprising aframecarryin-g a plunrality of sheet metal plates arranged in over lapping stepped relationand carrying acole lectilon gutter provided withan outlet opening at the lowest plate, said units being independently and removably secured side by side longitudinally of the drum sothat the.cor,-;

responding plates of adjacent units lie in T substantially common planes to form the composite terrace surfaces running longitudinally of the drum, and means. for directing feed water substantially unifor l against, the.

upper plates of said units, whereby said water Y is preheatedand purified by flowing down the sheet metal plates.

4. In a steam generating'boiler drum having an interior structure mounted within its water space, a feed water preheating and purifying apparatus mounted within the steamspace ofthe drum andconiprising a flow member presentinga composite flow surface inclined in cross-section from a longi-- tudinal line of'highest elevationnear the top of the drum and adjacent the vertical median plane of the water body to a -longitudinal line of lowest elevation at a sidewall of-the drum adjacent the water surface, said flow 5:

member being constitutedvof a plurality of individualuiiits arranged side by side longitudinally ofthe bo ler drum each supported and arranged to present aportion ofxsa-id flow-surface liavingits lowest elevation at a side wall of the drum and each being readily and separately removable, and means for (11- recting feed water substantially uniformly against theupper portion of saidcon p'osite flow surface, whereby said feed wateripasses a longitudinally disposed lower oversaid flow surface and is delivered the along a line adjacent aside wall water body of thedrum.

, r 5. In a steam generating boiler drum having a heating element providing passage for a heat carrier mounted within its water space substantially longitudinally and centrally thereof, a feed water preheating and purifying apparatus mounted within the steam space ofthe drum and comprising a longi: tudinally disposed flow member presenting a composite flow. surfaceinclined incrosssection from a longitudinal l1ne of highest elevation near the top of the drum and adj acent the vertical median plane of the water bodyto a longitudinal line of lowest elevation at a side wall of the drum adjacent the water surface, said 'fiow member being'constituted'of a plurality of individual units ar-- ranged side by side longitudinally of the boiler drum each supported andiarranged to presenta portionof said flow surface having its lowest, elevation at a side wall of the drum and each being readily and separately removable, and means for directing feed watersubstantially uniformly against the upper-upon ti'onof said composite flow surface, whereby said feed water passes over saidfiow surface and is delivered to the line adjacent a sidewall of the drum andremoved from said heating element. k

' 6.1 A feed water heating and purifying apparatus'disposed withinthe steam spacejof a steam generating boiler drum, comprising support secured to a side wall of the drum adjacent thereto and to the water surface, .a second longitudinally disposed upper support se cured adjacent the top wall of the drum near the vertical median plane of the water body,

a plurality of individual units independently mounted side by side upon said supports and each presenting an upperifiow surface inclining substantially from the upper to the lower support, said units presenting a composite flow-surface parallel with respect to the longitudinal axis of the drum and inclined Y to the horizontal substantially in' a lane passing through said supports, and means for directing feed water substantially uniformly-against the upper portion of'said composite flow surfaceto cause the same to flow thereover to thewater body along a line adjacent said side wall of the drum;

'7. A feed water heating and purifying apparatus disposed'within the steam space'of a' ,withItheir flow plates extending water body along-a flow platesgmounted thereon and having means at the upper and lower cndsthereof for removably supporting the same from the aforementioned upper and lower supporting rods, said units being arranged side by side endto end longitudinally of the drum to present accomposite flow surface inclined in cross-section substantially along a plane passing through ing a feed water substantially uniformly against the upper plates of said units to'cause the same to pass over the composite flow surface to the water body along a line adjacent said side wall of the drum. a

8. A structure as claimed in claim 7 where'- in the frame of each unit carries below its lowermost plate a'collection gutter having, an outlet opening. 7 v I i 'A' structure'as claimed in claim 7 wherein the supporting means for the frame of each unit constitute hooks at the upper end andslotted arms at the lower end. Y

K10. A structure as claimed in. claim 7 whereinthe flow plates of each unit are arranged in overlappingstepped' relation at j progressively increasing elevations thereby to present a composite stepped flow surface;

11. A structure as claimed in claim 7 whereinthere is a substantially free path between the lower surfaces of the flow plates and the water surface. 7 j a 12. In a steam generating boiler drum having an interiorstructure mounted within its water space substantially centrally thereof, av lower supporting rod extending longitudinally inside the steam space of the drum adj acent a sidewall and the water surface, a second upper longitudinal supporting rod se-- cured inside the drum adjacent the topthereof and the vertical median plane of the water body, aplurality of flow member units each comprising a frame having flow plates 'mounted thereon and having means at the upper and lower ends thereof for. removably supporting the same from said supporting rods, said unitsibeingarranged side by side -with their flow plates extending end to end longitudinally of the drum to present a composite flow surface inclined inicross-section substantially along a plane passing through said; supporting rods, and means for directsaid supporting rods, and means for direct ing'ffeed water 7 substantially uniformly against the upper plates of said units to cause the same to pass over the compositeflow surface for delivery to the water body adjacent the'side wallof the drum and removed from saidinterior structure.

"13. device as defined in claim 12 wherein each unit :isprovided with a collection gutter below the lower edge of its flow surface, said gutter having an outlet opening for directing the water from the flowsurface to the main body of water in the drum-ata point removed I from the, interior structure.

14. A st'ructure as defined in claim 12 wherein the flow plates of each unit are arranged in overlapping stepped relation at progressively increasing elevations thereby to cause a dripping of the incoming feed water with subsequent discharge beyond. a 7 projection of the said interior structure.

15. In a steam generating boiler 'drum mounted with its longitudinal axis in a hori- 10 zontal plane and having-'aheating element providing passagefor a heat carrier mounted within its water space substantially longitudinally and centrally there0f,'the coils of said heating element presenting an upper substantially horizontal surface adjacent the water level, a lower supporting rod secured within the drum extending longitudinally thereof adjacent a side wall at the water level, a second upper longitudinal supporting rod secured inside the drum adjacent the top thereof and the vertical median plane of the water body, a plurality of frames each having a pair of slotted arms engaging the lower supporting rod at its lower end and a pair of hooks engaging the upper supporting rod at; its upper end, a plurality of flow plates mounted on each of said frames in overlapping relation at progressively increasing elevations to form. a plurality of stepped surfaces extending between the supporting rods, a collection gutter mounted on each frame below the lowest flow plate and provided with an outlet opening leading to the water space beyond the heating element, each frame with its flow plates, gutter, hooks, and slot ted arms constituting a unit, said units being arranged side by side whereby the upper sur faces of their flow plates present a composite flow surface having a number of steps equivalent to the number of flow plates of each unit, and a feed water conduit having discharge openings directedtowards the upper surfaces of the upper flow plates of saidunits, the lower surfaces of the flow plates of said units being substantially freely exposed to the steam issuing from the water space.

In testimony whereof, we have hereunto set our signatures. i

' OTTO I-I. HARTMANN. so HANS TREDE. 

